The documents have been released in small batches over the past nine months. Collectively, they show allegations of hazing and recruit abuse – ranging from physical violence to inappropriate language – in each of Parris Island’s four recruit training battalions.

The newest files, summarized below, reveal allegations against the depot’s Support Battalion, too. Like those in the first group of files, the “Opinions” or “Recommendations” sections – revealing portions of the files where investigators offer a sense of what might have happened, and what action they feel should be taken – are often heavily redacted, if not entirely blacked out. Sections entitled “Findings of Fact” or “Summary of Findings” were mostly visible, with the exception of names that were redacted.

“First, thank you for your service and the wonderful ceremony last week for India and Papa Companies,” read one of the first lines of the letter, which was emailed to an undisclosed recipient on May 18, 2015. “Second, I apologize for writing an anonymous e-mail, but I do not want the (drill instructors) to call forward to (Marine Corps Base Camp) Lejeune to mark my son for this e-mail, as he is unaware that I am sending this.

“I am afraid I am going to be one of the parents who is very concerned about the treatment that the new Marines underwent at 3rd (Recruit Training Battalion), specifically Platoon 3036,” the letter continued. “I confirmed with my friends who were DIs on Parris Island, and they agree that you need to be aware of what is going on.”

The email address of the sender was blacked out by the Corps, but the signature that accompanied it – “Retired MSGT” – remains. The author identified himself as a parent, a Marine who trained on Parris Island in 1988, who worked there from 1992 to 1995 and is the son of a Vietnam-era Marine.

The sender said his son shared stories from boot camp, how the platoon was told that its blankets were only for “decoration” and not to be used, how his son and his platoon mates would put on extra T-shirts and socks at night and stuff their hands in their shirts “as the barracks rooms were ice cold each night.”

The letter further alleged that one of the DIs “liked to slam the recruits against the wall while wrapping their hands around their neck and choking them.” “My son was not complaining, but he was bragging about how he couldn’t breathe and talk ... as if it was an honor.”

And the letter stated that his son suffered a dislocated shoulder when he was slammed into a wall.

The day after the letter was received, Marine Corps investigators conducted phone interviews with six Marines, former recruits in Platoon 3036. All of them denied practically every allegation made in the letter, including this one: a “common phrase given to the recruits was ‘What happens in 3rd BN, stays in 3rd BN.’ ”

The former recruits did say that drill instructors’ foul language” – another accusation in the letter – was infrequent and, in their judgment, accidental.

“Now, my father is a Marine from 1969,” the letter continued. “I was there in 1988. We both had hard core DIs, but not once did they ever touch us. Their style of leadership was already intimidating enough to make us move and feel as if we earned the title Marine.”

And then the author wrote something that would prove true.

“The 3rd BN-type of leadership will eventually lead to severe consequences for someone, which I am sure you are aware.”

One of the drill instructors implicated in that incident, Gunnery Sgt. Joseph Felix, is expected this week to stand trial by general court-martial for his alleged abuse of Bourmeche, and for his alleged mistreatment of former recruit Raheel Siddiqui, who leaped to his death March 18, 2016, moments after a reported altercation with the DI.

Siddiqui’s death and the investigation of it spawned a depot-wide hazing probe, much of which centered on allegations of recruit abuse in 3rd Recruit Training Battalion.

That Battalion’s commander, Lt. Col. Joshua Kissoon, was relieved. He awaits court-martial for allegedly failing to prevent Felix – who was already under investigation for the dryer incident in March 2016 – from supervising Siddiqui’s platoon.

Other “high-vis” reliefs of command – including that of regimental commander Col. Paul Cucinotta – have occurred.